blob: 82446ad72204d04d6600419978869d0f8d37434f [file] [log] [blame]
// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/scheduler/scheduler.h"
#include <stddef.h>
#include <string>
#include <vector>
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/message_loop/message_loop.h"
#include "base/numerics/safe_conversions.h"
#include "base/run_loop.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "cc/output/begin_frame_args.h"
#include "cc/test/begin_frame_args_test.h"
#include "cc/test/fake_external_begin_frame_source.h"
#include "cc/test/ordered_simple_task_runner.h"
#include "cc/test/scheduler_test_common.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#define EXPECT_ACTION(action, client, action_index, expected_num_actions) \
do { \
EXPECT_EQ(expected_num_actions, client->num_actions_()); \
if (action_index >= 0) { \
ASSERT_LT(action_index, client->num_actions_()) << scheduler_.get(); \
EXPECT_STREQ(action, client->Action(action_index)); \
} \
for (int i = expected_num_actions; i < client->num_actions_(); ++i) \
ADD_FAILURE() << "Unexpected action: " << client->Action(i) \
<< " with state:\n" \
<< client->StateForAction(i); \
} while (false)
#define EXPECT_NO_ACTION(client) EXPECT_ACTION("", client, -1, 0)
#define EXPECT_SINGLE_ACTION(action, client) EXPECT_ACTION(action, client, 0, 1)
#define EXPECT_SCOPED(statements) \
{ \
SCOPED_TRACE(""); \
statements; \
}
namespace cc {
namespace {
base::TimeDelta kSlowDuration = base::TimeDelta::FromSeconds(1);
base::TimeDelta kFastDuration = base::TimeDelta::FromMilliseconds(1);
class FakeSchedulerClient : public SchedulerClient,
public FakeExternalBeginFrameSource::Client {
public:
FakeSchedulerClient()
: inside_begin_impl_frame_(false),
automatic_ack_(true),
scheduler_(nullptr) {
Reset();
}
void Reset() {
actions_.clear();
states_.clear();
will_begin_impl_frame_causes_redraw_ = false;
will_begin_impl_frame_requests_one_begin_impl_frame_ = false;
draw_will_happen_ = true;
swap_will_happen_if_draw_happens_ = true;
num_draws_ = 0;
last_begin_main_frame_args_ = BeginFrameArgs();
}
void set_scheduler(TestScheduler* scheduler) { scheduler_ = scheduler; }
bool needs_begin_frames() { return scheduler_->begin_frames_expected(); }
int num_draws() const { return num_draws_; }
int num_actions_() const { return static_cast<int>(actions_.size()); }
const char* Action(int i) const { return actions_[i]; }
std::string StateForAction(int i) const { return states_[i]->ToString(); }
base::TimeTicks posted_begin_impl_frame_deadline() const {
return posted_begin_impl_frame_deadline_;
}
int ActionIndex(const char* action) const {
for (size_t i = 0; i < actions_.size(); i++)
if (!strcmp(actions_[i], action))
return base::checked_cast<int>(i);
return -1;
}
bool HasAction(const char* action) const { return ActionIndex(action) >= 0; }
void SetWillBeginImplFrameRequestsOneBeginImplFrame(bool request) {
will_begin_impl_frame_requests_one_begin_impl_frame_ = request;
}
void SetWillBeginImplFrameCausesRedraw(bool causes_redraw) {
will_begin_impl_frame_causes_redraw_ = causes_redraw;
}
void SetDrawWillHappen(bool draw_will_happen) {
draw_will_happen_ = draw_will_happen;
}
void SetSwapWillHappenIfDrawHappens(bool swap_will_happen_if_draw_happens) {
swap_will_happen_if_draw_happens_ = swap_will_happen_if_draw_happens;
}
void SetAutomaticSubmitCompositorFrameAck(bool automatic_ack) {
automatic_ack_ = automatic_ack;
}
// SchedulerClient implementation.
void WillBeginImplFrame(const BeginFrameArgs& args) override {
EXPECT_FALSE(inside_begin_impl_frame_);
inside_begin_impl_frame_ = true;
PushAction("WillBeginImplFrame");
if (will_begin_impl_frame_requests_one_begin_impl_frame_)
scheduler_->SetNeedsOneBeginImplFrame();
if (will_begin_impl_frame_causes_redraw_)
scheduler_->SetNeedsRedraw();
}
void DidFinishImplFrame() override {
EXPECT_TRUE(inside_begin_impl_frame_);
inside_begin_impl_frame_ = false;
}
void ScheduledActionSendBeginMainFrame(const BeginFrameArgs& args) override {
PushAction("ScheduledActionSendBeginMainFrame");
last_begin_main_frame_args_ = args;
}
const BeginFrameArgs& last_begin_main_frame_args() {
return last_begin_main_frame_args_;
}
DrawResult ScheduledActionDrawIfPossible() override {
PushAction("ScheduledActionDrawIfPossible");
num_draws_++;
DrawResult result =
draw_will_happen_ ? DRAW_SUCCESS : DRAW_ABORTED_CHECKERBOARD_ANIMATIONS;
bool swap_will_happen =
draw_will_happen_ && swap_will_happen_if_draw_happens_;
if (swap_will_happen) {
scheduler_->DidSubmitCompositorFrame();
if (automatic_ack_)
scheduler_->DidReceiveCompositorFrameAck();
}
return result;
}
DrawResult ScheduledActionDrawForced() override {
PushAction("ScheduledActionDrawForced");
return DRAW_SUCCESS;
}
void ScheduledActionCommit() override {
PushAction("ScheduledActionCommit");
scheduler_->DidCommit();
}
void ScheduledActionActivateSyncTree() override {
PushAction("ScheduledActionActivateSyncTree");
}
void ScheduledActionBeginCompositorFrameSinkCreation() override {
PushAction("ScheduledActionBeginCompositorFrameSinkCreation");
}
void ScheduledActionPrepareTiles() override {
PushAction("ScheduledActionPrepareTiles");
scheduler_->WillPrepareTiles();
scheduler_->DidPrepareTiles();
}
void ScheduledActionInvalidateCompositorFrameSink() override {
actions_.push_back("ScheduledActionInvalidateCompositorFrameSink");
states_.push_back(scheduler_->AsValue());
}
void ScheduledActionPerformImplSideInvalidation() override {
PushAction("ScheduledActionPerformImplSideInvalidation");
}
void SendBeginMainFrameNotExpectedSoon() override {
PushAction("SendBeginMainFrameNotExpectedSoon");
}
bool IsInsideBeginImplFrame() const { return inside_begin_impl_frame_; }
base::Callback<bool(void)> InsideBeginImplFrame(bool state) {
return base::Bind(&FakeSchedulerClient::InsideBeginImplFrameCallback,
base::Unretained(this), state);
}
bool IsCurrentFrame(int last_frame_number) const {
return scheduler_->current_frame_number() == last_frame_number;
}
base::Callback<bool(void)> FrameHasNotAdvancedCallback() {
return base::Bind(&FakeSchedulerClient::IsCurrentFrame,
base::Unretained(this),
scheduler_->current_frame_number());
}
void PushAction(const char* description) {
actions_.push_back(description);
states_.push_back(scheduler_->AsValue());
}
// FakeExternalBeginFrameSource::Client implementation.
void OnAddObserver(BeginFrameObserver* obs) override {
PushAction("AddObserver(this)");
}
void OnRemoveObserver(BeginFrameObserver* obs) override {
PushAction("RemoveObserver(this)");
}
protected:
bool InsideBeginImplFrameCallback(bool state) {
return inside_begin_impl_frame_ == state;
}
bool inside_begin_impl_frame_;
bool will_begin_impl_frame_causes_redraw_;
bool will_begin_impl_frame_requests_one_begin_impl_frame_;
bool draw_will_happen_;
bool swap_will_happen_if_draw_happens_;
bool automatic_ack_;
int num_draws_;
BeginFrameArgs last_begin_main_frame_args_;
base::TimeTicks posted_begin_impl_frame_deadline_;
std::vector<const char*> actions_;
std::vector<std::unique_ptr<base::trace_event::ConvertableToTraceFormat>>
states_;
TestScheduler* scheduler_;
};
enum BeginFrameSourceType {
EXTERNAL_BFS,
UNTHROTTLED_BFS,
THROTTLED_BFS,
};
class SchedulerTest : public testing::Test {
public:
SchedulerTest()
: now_src_(new base::SimpleTestTickClock()),
task_runner_(new OrderedSimpleTaskRunner(now_src_.get(), true)),
fake_external_begin_frame_source_(nullptr),
fake_compositor_timing_history_(nullptr) {
now_src_->Advance(base::TimeDelta::FromMicroseconds(10000));
// A bunch of tests require NowTicks()
// to be > BeginFrameArgs::DefaultInterval()
now_src_->Advance(base::TimeDelta::FromMilliseconds(100));
// Fail if we need to run 100 tasks in a row.
task_runner_->SetRunTaskLimit(100);
}
~SchedulerTest() override {}
protected:
TestScheduler* CreateScheduler(BeginFrameSourceType bfs_type) {
BeginFrameSource* frame_source = nullptr;
unthrottled_frame_source_.reset(new BackToBackBeginFrameSource(
base::MakeUnique<TestDelayBasedTimeSource>(now_src_.get(),
task_runner_.get())));
fake_external_begin_frame_source_.reset(
new FakeExternalBeginFrameSource(0.f, false));
fake_external_begin_frame_source_->SetClient(client_.get());
synthetic_frame_source_.reset(new DelayBasedBeginFrameSource(
base::MakeUnique<TestDelayBasedTimeSource>(now_src_.get(),
task_runner_.get())));
switch (bfs_type) {
case EXTERNAL_BFS:
frame_source = fake_external_begin_frame_source_.get();
break;
case UNTHROTTLED_BFS:
frame_source = unthrottled_frame_source_.get();
break;
case THROTTLED_BFS:
frame_source = synthetic_frame_source_.get();
break;
}
DCHECK(frame_source);
std::unique_ptr<FakeCompositorTimingHistory>
fake_compositor_timing_history = FakeCompositorTimingHistory::Create(
scheduler_settings_.using_synchronous_renderer_compositor);
fake_compositor_timing_history_ = fake_compositor_timing_history.get();
scheduler_.reset(new TestScheduler(
now_src_.get(), client_.get(), scheduler_settings_, 0,
task_runner_.get(), std::move(fake_compositor_timing_history)));
scheduler_->SetBeginFrameSource(frame_source);
client_->set_scheduler(scheduler_.get());
// Use large estimates by default to avoid latency recovery in most tests.
fake_compositor_timing_history_->SetAllEstimatesTo(kSlowDuration);
return scheduler_.get();
}
void SetUpScheduler(BeginFrameSourceType bfs_type,
std::unique_ptr<FakeSchedulerClient> client) {
client_ = std::move(client);
CreateScheduler(bfs_type);
EXPECT_SCOPED(InitializeCompositorFrameSinkAndFirstCommit());
}
void SetUpScheduler(BeginFrameSourceType bfs_type) {
SetUpScheduler(bfs_type, base::MakeUnique<FakeSchedulerClient>());
}
void SetUpSchedulerWithNoCompositorFrameSink(BeginFrameSourceType bfs_type) {
client_ = base::MakeUnique<FakeSchedulerClient>();
CreateScheduler(bfs_type);
}
OrderedSimpleTaskRunner& task_runner() { return *task_runner_; }
base::SimpleTestTickClock* now_src() { return now_src_.get(); }
// As this function contains EXPECT macros, to allow debugging it should be
// called inside EXPECT_SCOPED like so;
// EXPECT_SCOPED(
// client.InitializeCompositorFrameSinkAndFirstCommit(scheduler));
void InitializeCompositorFrameSinkAndFirstCommit() {
TRACE_EVENT0(
"cc", "SchedulerUnitTest::InitializeCompositorFrameSinkAndFirstCommit");
DCHECK(scheduler_);
// Check the client doesn't have any actions queued when calling this
// function.
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(scheduler_->begin_frames_expected());
// Start the initial CompositorFrameSink creation.
scheduler_->SetVisible(true);
scheduler_->SetCanDraw(true);
EXPECT_SINGLE_ACTION("ScheduledActionBeginCompositorFrameSinkCreation",
client_);
client_->Reset();
// We don't see anything happening until the first impl frame.
scheduler_->DidCreateAndInitializeCompositorFrameSink();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_TRUE(scheduler_->begin_frames_expected());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
{
SCOPED_TRACE("Do first frame to commit after initialize.");
AdvanceFrame();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
scheduler_->NotifyReadyToDraw();
EXPECT_FALSE(scheduler_->CommitPending());
if (scheduler_settings_.using_synchronous_renderer_compositor) {
scheduler_->SetNeedsRedraw();
bool resourceless_software_draw = false;
scheduler_->OnDrawForCompositorFrameSink(resourceless_software_draw);
} else {
// Run the posted deadline task.
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner_->RunTasksWhile(client_->InsideBeginImplFrame(true));
}
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
}
client_->Reset();
{
SCOPED_TRACE(
"Run second frame so Scheduler calls SetNeedsBeginFrame(false).");
AdvanceFrame();
if (!scheduler_settings_.using_synchronous_renderer_compositor) {
// Run the posted deadline task.
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner_->RunTasksWhile(client_->InsideBeginImplFrame(true));
}
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
}
EXPECT_FALSE(scheduler_->begin_frames_expected());
client_->Reset();
}
// As this function contains EXPECT macros, to allow debugging it should be
// called inside EXPECT_SCOPED like so;
// EXPECT_SCOPED(client.AdvanceFrame());
void AdvanceFrame() {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"),
"FakeSchedulerClient::AdvanceFrame");
// Send the next BeginFrame message if using an external source, otherwise
// it will be already in the task queue.
if (scheduler_->begin_frame_source() ==
fake_external_begin_frame_source_.get()) {
// Run pending task for previous deadline first.
task_runner_->RunPendingTasks();
EXPECT_TRUE(scheduler_->begin_frames_expected());
SendNextBeginFrame();
} else {
// Begin frame might be queued up and posted after the previous deadline
// runs so run tasks until we get to the next frame.
task_runner_->RunTasksWhile(client_->FrameHasNotAdvancedCallback());
}
}
BeginFrameArgs SendNextBeginFrame() {
DCHECK_EQ(scheduler_->begin_frame_source(),
fake_external_begin_frame_source_.get());
// Creep the time forward so that any BeginFrameArgs is not equal to the
// last one otherwise we violate the BeginFrameSource contract.
now_src_->Advance(BeginFrameArgs::DefaultInterval());
BeginFrameArgs args =
fake_external_begin_frame_source_->CreateBeginFrameArgs(
BEGINFRAME_FROM_HERE, now_src());
fake_external_begin_frame_source_->TestOnBeginFrame(args);
return args;
}
FakeExternalBeginFrameSource* fake_external_begin_frame_source() const {
return fake_external_begin_frame_source_.get();
}
void AdvanceAndMissOneFrame();
void CheckMainFrameSkippedAfterLateCommit(bool expect_send_begin_main_frame);
void ImplFrameSkippedAfterLateAck(bool receive_ack_before_deadline);
void ImplFrameNotSkippedAfterLateAck();
void BeginFramesNotFromClient(BeginFrameSourceType bfs_type);
void BeginFramesNotFromClient_IsDrawThrottled(BeginFrameSourceType bfs_type);
bool BeginMainFrameOnCriticalPath(TreePriority tree_priority,
ScrollHandlerState scroll_handler_state,
base::TimeDelta durations);
std::unique_ptr<base::SimpleTestTickClock> now_src_;
scoped_refptr<OrderedSimpleTaskRunner> task_runner_;
std::unique_ptr<FakeExternalBeginFrameSource>
fake_external_begin_frame_source_;
std::unique_ptr<SyntheticBeginFrameSource> synthetic_frame_source_;
std::unique_ptr<SyntheticBeginFrameSource> unthrottled_frame_source_;
SchedulerSettings scheduler_settings_;
std::unique_ptr<FakeSchedulerClient> client_;
std::unique_ptr<TestScheduler> scheduler_;
FakeCompositorTimingHistory* fake_compositor_timing_history_;
};
TEST_F(SchedulerTest, InitializeCompositorFrameSinkDoesNotBeginImplFrame) {
SetUpSchedulerWithNoCompositorFrameSink(EXTERNAL_BFS);
scheduler_->SetVisible(true);
scheduler_->SetCanDraw(true);
EXPECT_SINGLE_ACTION("ScheduledActionBeginCompositorFrameSinkCreation",
client_);
client_->Reset();
scheduler_->DidCreateAndInitializeCompositorFrameSink();
EXPECT_NO_ACTION(client_);
}
TEST_F(SchedulerTest, Stop) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
// No scheduled actions are performed after Stop. WillBeginImplFrame is only
// a notification and not an action performed by the scheduler.
scheduler_->Stop();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
client_->Reset();
}
TEST_F(SchedulerTest, VideoNeedsBeginFrames) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetVideoNeedsBeginFrames(true);
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
// WillBeginImplFrame is responsible for sending BeginFrames to video.
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
client_->Reset();
scheduler_->SetVideoNeedsBeginFrames(false);
EXPECT_NO_ACTION(client_);
client_->Reset();
task_runner_->RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_ACTION("RemoveObserver(this)", client_, 0, 2);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 1, 2);
EXPECT_FALSE(scheduler_->begin_frames_expected());
}
TEST_F(SchedulerTest, RequestCommit) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// If we don't swap on the deadline, we wait for the next BeginFrame.
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// NotifyReadyToCommit should trigger the commit.
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// NotifyReadyToActivate should trigger the activation.
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// BeginImplFrame should prepare the draw.
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// BeginImplFrame deadline should draw.
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_SINGLE_ACTION("ScheduledActionDrawIfPossible", client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// The following BeginImplFrame deadline should SetNeedsBeginFrame(false)
// to avoid excessive toggles.
EXPECT_SCOPED(AdvanceFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("RemoveObserver(this)", client_, 0, 2);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 1, 2);
client_->Reset();
}
TEST_F(SchedulerTest, RequestCommitAfterSetDeferCommit) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetDeferCommits(true);
scheduler_->SetNeedsBeginMainFrame();
EXPECT_NO_ACTION(client_);
client_->Reset();
task_runner().RunPendingTasks();
// There are no pending tasks or actions.
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(scheduler_->begin_frames_expected());
client_->Reset();
scheduler_->SetDeferCommits(false);
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
// Start new BeginMainFrame after defer commit is off.
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
}
TEST_F(SchedulerTest, DeferCommitWithRedraw) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetDeferCommits(true);
scheduler_->SetNeedsBeginMainFrame();
EXPECT_NO_ACTION(client_);
// The SetNeedsRedraw will override the SetDeferCommits(true), to allow a
// begin frame to be needed.
client_->Reset();
scheduler_->SetNeedsRedraw();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
AdvanceFrame();
// BeginMainFrame is not sent during the defer commit is on.
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_SINGLE_ACTION("ScheduledActionDrawIfPossible", client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
AdvanceFrame();
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
}
TEST_F(SchedulerTest, RequestCommitAfterBeginMainFrameSent) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// Now SetNeedsBeginMainFrame again. Calling here means we need a second
// commit.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_EQ(client_->num_actions_(), 0);
client_->Reset();
// Finish the first commit.
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// Activate it.
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// Because we just swapped, the Scheduler should also request the next
// BeginImplFrame from the CompositorFrameSink.
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// Since another commit is needed, the next BeginImplFrame should initiate
// the second commit.
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// Finishing the commit before the deadline should post a new deadline task
// to trigger the deadline early.
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
// On the next BeginImplFrame, verify we go back to a quiescent state and
// no longer request BeginImplFrames.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_FALSE(scheduler_->begin_frames_expected());
client_->Reset();
}
class SchedulerClientThatsetNeedsDrawInsideDraw : public FakeSchedulerClient {
public:
SchedulerClientThatsetNeedsDrawInsideDraw()
: FakeSchedulerClient(), request_redraws_(false) {}
void SetRequestRedrawsInsideDraw(bool enable) { request_redraws_ = enable; }
DrawResult ScheduledActionDrawIfPossible() override {
// Only SetNeedsRedraw the first time this is called
if (request_redraws_) {
scheduler_->SetNeedsRedraw();
}
return FakeSchedulerClient::ScheduledActionDrawIfPossible();
}
DrawResult ScheduledActionDrawForced() override {
NOTREACHED();
return DRAW_SUCCESS;
}
private:
bool request_redraws_;
};
// Tests for two different situations:
// 1. the scheduler dropping SetNeedsRedraw requests that happen inside
// a ScheduledActionDraw
// 2. the scheduler drawing twice inside a single tick
TEST_F(SchedulerTest, RequestRedrawInsideDraw) {
SchedulerClientThatsetNeedsDrawInsideDraw* client =
new SchedulerClientThatsetNeedsDrawInsideDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
client->SetRequestRedrawsInsideDraw(true);
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_EQ(0, client->num_draws());
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
client->SetRequestRedrawsInsideDraw(false);
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client_->num_draws());
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
// We stop requesting BeginImplFrames after a BeginImplFrame where we don't
// swap.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client->num_draws());
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(client->needs_begin_frames());
}
// Test that requesting redraw inside a failed draw doesn't lose the request.
TEST_F(SchedulerTest, RequestRedrawInsideFailedDraw) {
SchedulerClientThatsetNeedsDrawInsideDraw* client =
new SchedulerClientThatsetNeedsDrawInsideDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
client->SetRequestRedrawsInsideDraw(true);
client->SetDrawWillHappen(false);
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_EQ(0, client->num_draws());
// Fail the draw.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
// We have a commit pending and the draw failed, and we didn't lose the redraw
// request.
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
client->SetRequestRedrawsInsideDraw(false);
// Fail the draw again.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client->num_draws());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
// Draw successfully.
client->SetDrawWillHappen(true);
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(3, client->num_draws());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
}
class SchedulerClientThatSetNeedsBeginMainFrameInsideDraw
: public FakeSchedulerClient {
public:
SchedulerClientThatSetNeedsBeginMainFrameInsideDraw()
: set_needs_commit_on_next_draw_(false) {}
DrawResult ScheduledActionDrawIfPossible() override {
// Only SetNeedsBeginMainFrame the first time this is called
if (set_needs_commit_on_next_draw_) {
scheduler_->SetNeedsBeginMainFrame();
set_needs_commit_on_next_draw_ = false;
}
return FakeSchedulerClient::ScheduledActionDrawIfPossible();
}
DrawResult ScheduledActionDrawForced() override {
NOTREACHED();
return DRAW_SUCCESS;
}
void SetNeedsBeginMainFrameOnNextDraw() {
set_needs_commit_on_next_draw_ = true;
}
private:
bool set_needs_commit_on_next_draw_;
};
// Tests for the scheduler infinite-looping on SetNeedsBeginMainFrame requests
// that happen inside a ScheduledActionDraw
TEST_F(SchedulerTest, RequestCommitInsideDraw) {
SchedulerClientThatSetNeedsBeginMainFrameInsideDraw* client =
new SchedulerClientThatSetNeedsBeginMainFrameInsideDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
EXPECT_FALSE(client->needs_begin_frames());
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_EQ(0, client->num_draws());
EXPECT_TRUE(client->needs_begin_frames());
client->SetNeedsBeginMainFrameOnNextDraw();
EXPECT_SCOPED(AdvanceFrame());
client->SetNeedsBeginMainFrameOnNextDraw();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(client->needs_begin_frames());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client->num_draws());
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->CommitPending());
EXPECT_TRUE(client->needs_begin_frames());
// We stop requesting BeginImplFrames after a BeginImplFrame where we don't
// swap.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client->num_draws());
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->CommitPending());
EXPECT_FALSE(client->needs_begin_frames());
}
// Tests that when a draw fails then the pending commit should not be dropped.
TEST_F(SchedulerTest, RequestCommitInsideFailedDraw) {
SchedulerClientThatsetNeedsDrawInsideDraw* client =
new SchedulerClientThatsetNeedsDrawInsideDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
client->SetDrawWillHappen(false);
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_EQ(0, client->num_draws());
// Fail the draw.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
// We have a commit pending and the draw failed, and we didn't lose the commit
// request.
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
// Fail the draw again.
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client->num_draws());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
// Draw successfully.
client->SetDrawWillHappen(true);
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(3, client->num_draws());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
}
TEST_F(SchedulerTest, NoSwapWhenDrawFails) {
SchedulerClientThatSetNeedsBeginMainFrameInsideDraw* client =
new SchedulerClientThatSetNeedsBeginMainFrameInsideDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_EQ(0, client->num_draws());
// Draw successfully, this starts a new frame.
client->SetNeedsBeginMainFrameOnNextDraw();
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(client->needs_begin_frames());
// Fail to draw, this should not start a frame.
client->SetDrawWillHappen(false);
client->SetNeedsBeginMainFrameOnNextDraw();
EXPECT_SCOPED(AdvanceFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(2, client->num_draws());
}
class SchedulerClientNeedsPrepareTilesInDraw : public FakeSchedulerClient {
public:
DrawResult ScheduledActionDrawIfPossible() override {
scheduler_->SetNeedsPrepareTiles();
return FakeSchedulerClient::ScheduledActionDrawIfPossible();
}
};
// Test prepare tiles is independant of draws.
TEST_F(SchedulerTest, PrepareTiles) {
SchedulerClientNeedsPrepareTilesInDraw* client =
new SchedulerClientNeedsPrepareTilesInDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
// Request both draw and prepare tiles. PrepareTiles shouldn't
// be trigged until BeginImplFrame.
client->Reset();
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_TRUE(scheduler_->PrepareTilesPending());
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_EQ(0, client->num_draws());
EXPECT_FALSE(client->HasAction("ScheduledActionPrepareTiles"));
EXPECT_FALSE(client->HasAction("ScheduledActionDrawIfPossible"));
// We have no immediate actions to perform, so the BeginImplFrame should post
// the deadline task.
client->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
// On the deadline, the actions should have occured in the right order.
client->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
EXPECT_TRUE(client->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_TRUE(client->HasAction("ScheduledActionPrepareTiles"));
EXPECT_LT(client->ActionIndex("ScheduledActionDrawIfPossible"),
client->ActionIndex("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->PrepareTilesPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// Request a draw. We don't need a PrepareTiles yet.
client->Reset();
scheduler_->SetNeedsRedraw();
EXPECT_TRUE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->PrepareTilesPending());
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_EQ(0, client->num_draws());
// We have no immediate actions to perform, so the BeginImplFrame should post
// the deadline task.
client->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
// Draw. The draw will trigger SetNeedsPrepareTiles, and
// then the PrepareTiles action will be triggered after the Draw.
// Afterwards, neither a draw nor PrepareTiles are pending.
client->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client->num_draws());
EXPECT_TRUE(client->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_TRUE(client->HasAction("ScheduledActionPrepareTiles"));
EXPECT_LT(client->ActionIndex("ScheduledActionDrawIfPossible"),
client->ActionIndex("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->PrepareTilesPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// We need a BeginImplFrame where we don't swap to go idle.
client->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("RemoveObserver(this)", client_, 0, 2);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 1, 2);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_EQ(0, client->num_draws());
// Now trigger a PrepareTiles outside of a draw. We will then need
// a begin-frame for the PrepareTiles, but we don't need a draw.
client->Reset();
EXPECT_FALSE(client->needs_begin_frames());
scheduler_->SetNeedsPrepareTiles();
EXPECT_TRUE(client->needs_begin_frames());
EXPECT_TRUE(scheduler_->PrepareTilesPending());
EXPECT_FALSE(scheduler_->RedrawPending());
// BeginImplFrame. There will be no draw, only PrepareTiles.
client->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(0, client->num_draws());
EXPECT_FALSE(client->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_TRUE(client->HasAction("ScheduledActionPrepareTiles"));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
}
// Test that PrepareTiles only happens once per frame. If an external caller
// initiates it, then the state machine should not PrepareTiles on that frame.
TEST_F(SchedulerTest, PrepareTilesOncePerFrame) {
SetUpScheduler(EXTERNAL_BFS);
// If DidPrepareTiles during a frame, then PrepareTiles should not occur
// again.
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->PrepareTilesPending());
scheduler_->WillPrepareTiles();
scheduler_->DidPrepareTiles(); // An explicit PrepareTiles.
EXPECT_FALSE(scheduler_->PrepareTilesPending());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client_->num_draws());
EXPECT_TRUE(client_->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_FALSE(client_->HasAction("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->PrepareTilesPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// Next frame without DidPrepareTiles should PrepareTiles with draw.
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client_->num_draws());
EXPECT_TRUE(client_->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_TRUE(client_->HasAction("ScheduledActionPrepareTiles"));
EXPECT_LT(client_->ActionIndex("ScheduledActionDrawIfPossible"),
client_->ActionIndex("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->PrepareTilesPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// If we get another DidPrepareTiles within the same frame, we should
// not PrepareTiles on the next frame.
scheduler_->WillPrepareTiles();
scheduler_->DidPrepareTiles(); // An explicit PrepareTiles.
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->PrepareTilesPending());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client_->num_draws());
EXPECT_TRUE(client_->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_FALSE(client_->HasAction("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// If we get another DidPrepareTiles, we should not PrepareTiles on the next
// frame. This verifies we don't alternate calling PrepareTiles once and
// twice.
EXPECT_TRUE(scheduler_->PrepareTilesPending());
scheduler_->WillPrepareTiles();
scheduler_->DidPrepareTiles(); // An explicit PrepareTiles.
EXPECT_FALSE(scheduler_->PrepareTilesPending());
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->PrepareTilesPending());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client_->num_draws());
EXPECT_TRUE(client_->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_FALSE(client_->HasAction("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// Next frame without DidPrepareTiles should PrepareTiles with draw.
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client_->num_draws());
EXPECT_TRUE(client_->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_TRUE(client_->HasAction("ScheduledActionPrepareTiles"));
EXPECT_LT(client_->ActionIndex("ScheduledActionDrawIfPossible"),
client_->ActionIndex("ScheduledActionPrepareTiles"));
EXPECT_FALSE(scheduler_->RedrawPending());
EXPECT_FALSE(scheduler_->PrepareTilesPending());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
}
TEST_F(SchedulerTest, PrepareTilesFunnelResetOnVisibilityChange) {
std::unique_ptr<SchedulerClientNeedsPrepareTilesInDraw> client =
base::WrapUnique(new SchedulerClientNeedsPrepareTilesInDraw);
SetUpScheduler(EXTERNAL_BFS, std::move(client));
// Simulate a few visibility changes and associated PrepareTiles.
for (int i = 0; i < 10; i++) {
scheduler_->SetVisible(false);
scheduler_->WillPrepareTiles();
scheduler_->DidPrepareTiles();
scheduler_->SetVisible(true);
scheduler_->WillPrepareTiles();
scheduler_->DidPrepareTiles();
}
client_->Reset();
scheduler_->SetNeedsRedraw();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
AdvanceFrame();
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 2);
EXPECT_ACTION("ScheduledActionPrepareTiles", client_, 1, 2);
}
TEST_F(SchedulerTest, TriggerBeginFrameDeadlineEarly) {
SchedulerClientNeedsPrepareTilesInDraw* client =
new SchedulerClientNeedsPrepareTilesInDraw;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
scheduler_->SetNeedsRedraw();
EXPECT_SCOPED(AdvanceFrame());
// The deadline should be zero since there is no work other than drawing
// pending.
EXPECT_EQ(base::TimeTicks(), client->posted_begin_impl_frame_deadline());
}
TEST_F(SchedulerTest, WaitForReadyToDrawDoNotPostDeadline) {
SchedulerClientNeedsPrepareTilesInDraw* client =
new SchedulerClientNeedsPrepareTilesInDraw;
scheduler_settings_.commit_to_active_tree = true;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
// Begin new frame.
EXPECT_SCOPED(AdvanceFrame());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
client_->Reset();
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
// Scheduler won't post deadline in the mode.
client_->Reset();
task_runner().RunPendingTasks(); // Try to run posted deadline.
// There is no posted deadline.
EXPECT_NO_ACTION(client_);
// Scheduler received ready to draw signal, and posted deadline.
scheduler_->NotifyReadyToDraw();
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_EQ(1, client_->num_draws());
EXPECT_TRUE(client_->HasAction("ScheduledActionDrawIfPossible"));
}
TEST_F(SchedulerTest, WaitForReadyToDrawCancelledWhenLostCompositorFrameSink) {
SchedulerClientNeedsPrepareTilesInDraw* client =
new SchedulerClientNeedsPrepareTilesInDraw;
scheduler_settings_.commit_to_active_tree = true;
SetUpScheduler(EXTERNAL_BFS, base::WrapUnique(client));
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
// Begin new frame.
EXPECT_SCOPED(AdvanceFrame());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
client_->Reset();
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
// Scheduler won't post deadline in the mode.
client_->Reset();
task_runner().RunPendingTasks(); // Try to run posted deadline.
// There is no posted deadline.
EXPECT_NO_ACTION(client_);
// Scheduler loses CompositorFrameSink, and stops waiting for ready to draw
// signal.
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 0,
3);
EXPECT_ACTION("RemoveObserver(this)", client_, 1, 3);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 2, 3);
}
void SchedulerTest::AdvanceAndMissOneFrame() {
// Impl thread hits deadline before commit finishes.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_ACTION("AddObserver(this)", client_, 0, 5);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 5);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 5);
EXPECT_ACTION("ScheduledActionCommit", client_, 3, 5);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 4, 5);
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
client_->Reset();
}
void SchedulerTest::CheckMainFrameSkippedAfterLateCommit(
bool expect_send_begin_main_frame) {
AdvanceAndMissOneFrame();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_EQ(expect_send_begin_main_frame,
scheduler_->MainThreadMissedLastDeadline());
EXPECT_TRUE(client_->HasAction("WillBeginImplFrame"));
EXPECT_EQ(expect_send_begin_main_frame,
client_->HasAction("ScheduledActionSendBeginMainFrame"));
}
TEST_F(SchedulerTest, MainFrameNotSkippedAfterLateBeginFrame) {
// If a begin frame is delivered extremely late (because the browser has
// some contention), make sure that the main frame is not skipped even
// if it can activate before the deadline.
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
AdvanceAndMissOneFrame();
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->SetNeedsBeginMainFrame();
// Advance frame and create a begin frame.
now_src_->Advance(BeginFrameArgs::DefaultInterval());
BeginFrameArgs args = fake_external_begin_frame_source_->CreateBeginFrameArgs(
BEGINFRAME_FROM_HERE, now_src());
// Deliver this begin frame super late.
now_src_->Advance(BeginFrameArgs::DefaultInterval() * 100);
fake_external_begin_frame_source_->TestOnBeginFrame(args);
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_EQ(true, scheduler_->MainThreadMissedLastDeadline());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 2, 3);
}
TEST_F(SchedulerTest, MainFrameSkippedAfterLateCommit) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
bool expect_send_begin_main_frame = false;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
// Response times of BeginMainFrame's without the critical path flag set
// should not affect whether we recover latency or not.
TEST_F(SchedulerTest,
MainFrameSkippedAfterLateCommit_LongMainFrameQueueDurationNotCritical) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_
->SetBeginMainFrameQueueDurationNotCriticalEstimate(kSlowDuration);
bool expect_send_begin_main_frame = false;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
// Response times of BeginMainFrame's with the critical path flag set
// should affect whether we recover latency or not.
TEST_F(SchedulerTest,
MainFrameNotSkippedAfterLateCommit_LongMainFrameQueueDurationCritical) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_
->SetBeginMainFrameQueueDurationCriticalEstimate(kSlowDuration);
fake_compositor_timing_history_
->SetBeginMainFrameQueueDurationNotCriticalEstimate(kSlowDuration);
bool expect_send_begin_main_frame = true;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
TEST_F(SchedulerTest,
MainFrameNotSkippedAfterLateCommitInPreferImplLatencyMode) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetTreePrioritiesAndScrollState(
SMOOTHNESS_TAKES_PRIORITY,
ScrollHandlerState::SCROLL_DOES_NOT_AFFECT_SCROLL_HANDLER);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
bool expect_send_begin_main_frame = true;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
TEST_F(SchedulerTest,
MainFrameNotSkippedAfterLateCommit_CommitEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_
->SetBeginMainFrameStartToCommitDurationEstimate(kSlowDuration);
bool expect_send_begin_main_frame = true;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
TEST_F(SchedulerTest,
MainFrameNotSkippedAfterLateCommit_ReadyToActivateEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_->SetCommitToReadyToActivateDurationEstimate(
kSlowDuration);
bool expect_send_begin_main_frame = true;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
TEST_F(SchedulerTest,
MainFrameNotSkippedAfterLateCommit_ActivateEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_->SetActivateDurationEstimate(kSlowDuration);
bool expect_send_begin_main_frame = true;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
TEST_F(SchedulerTest, MainFrameNotSkippedAfterLateCommit_DrawEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_->SetDrawDurationEstimate(kSlowDuration);
bool expect_send_begin_main_frame = true;
EXPECT_SCOPED(
CheckMainFrameSkippedAfterLateCommit(expect_send_begin_main_frame));
}
// If the BeginMainFrame aborts, it doesn't actually insert a frame into the
// queue, which means there is no latency to recover.
TEST_F(SchedulerTest, MainFrameNotSkippedAfterLateBeginMainFrameAbort) {
SetUpScheduler(EXTERNAL_BFS);
// Use fast estimates so we think we can recover latency if needed.
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
// Impl thread hits deadline before BeginMainFrame aborts.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("AddObserver(this)", client_, 0, 3);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 3);
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
// After aborting the frame, make sure we don't skip the
// next BeginMainFrame.
client_->Reset();
scheduler_->BeginMainFrameAborted(CommitEarlyOutReason::FINISHED_NO_UPDATES);
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(client_->HasAction("WillBeginImplFrame"));
EXPECT_TRUE(client_->HasAction("ScheduledActionSendBeginMainFrame"));
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
}
// If the BeginMainFrame aborts, it doesn't actually insert a frame into the
// queue, which means there is no latency to recover.
TEST_F(SchedulerTest, MainFrameNotSkippedAfterCanDrawChanges) {
SetUpScheduler(EXTERNAL_BFS);
// Use fast estimates so we think we can recover latency if needed.
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
// Impl thread hits deadline before BeginMainFrame aborts.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("AddObserver(this)", client_, 0, 3);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 3);
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
// Make us abort the upcoming draw.
client_->Reset();
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_ACTION("ScheduledActionCommit", client_, 0, 2);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 1, 2);
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->SetCanDraw(false);
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
// Make CanDraw true after activation.
client_->Reset();
scheduler_->SetCanDraw(true);
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
// Make sure we don't skip the next BeginMainFrame.
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(client_->HasAction("WillBeginImplFrame"));
EXPECT_TRUE(client_->HasAction("ScheduledActionSendBeginMainFrame"));
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
}
void SchedulerTest::ImplFrameSkippedAfterLateAck(
bool receive_ack_before_deadline) {
// To get into a high latency state, this test disables automatic swap acks.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// Draw and swap for first BeginFrame
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
scheduler_->SetNeedsRedraw();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_ACTION("AddObserver(this)", client_, 0, 3);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 3);
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionCommit", client_, 0, 3);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 1, 3);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 2, 3);
// Verify we skip every other frame if the swap ack consistently
// comes back late.
for (int i = 0; i < 10; i++) {
// Not calling scheduler_->DidReceiveCompositorFrameAck() until after next
// BeginImplFrame puts the impl thread in high latency mode.
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
scheduler_->SetNeedsRedraw();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
// Verify that we skip the BeginImplFrame
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
// Verify that we do not perform any actions after we are no longer
// swap throttled.
client_->Reset();
if (receive_ack_before_deadline) {
// It shouldn't matter if the swap ack comes back before the deadline...
scheduler_->DidReceiveCompositorFrameAck();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
} else {
// ... or after the deadline.
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
scheduler_->DidReceiveCompositorFrameAck();
}
EXPECT_NO_ACTION(client_);
// Verify that we start the next BeginImplFrame and continue normally
// after having just skipped a BeginImplFrame.
client_->Reset();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionCommit", client_, 0, 3);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 1, 3);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 2, 3);
}
}
TEST_F(SchedulerTest,
ImplFrameSkippedAfterLateAck_FastEstimates_SubmitAckThenDeadline) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
bool receive_ack_before_deadline = true;
EXPECT_SCOPED(ImplFrameSkippedAfterLateAck(receive_ack_before_deadline));
}
TEST_F(SchedulerTest,
ImplFrameSkippedAfterLateAck_FastEstimates_DeadlineThenSubmitAck) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
bool receive_ack_before_deadline = false;
EXPECT_SCOPED(ImplFrameSkippedAfterLateAck(receive_ack_before_deadline));
}
TEST_F(SchedulerTest,
ImplFrameSkippedAfterLateAck_LongMainFrameQueueDurationNotCritical) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_
->SetBeginMainFrameQueueDurationNotCriticalEstimate(kSlowDuration);
bool receive_ack_before_deadline = false;
EXPECT_SCOPED(ImplFrameSkippedAfterLateAck(receive_ack_before_deadline));
}
TEST_F(SchedulerTest, ImplFrameSkippedAfterLateAck_ImplLatencyTakesPriority) {
SetUpScheduler(EXTERNAL_BFS);
// Even if every estimate related to the main thread is slow, we should
// still expect to recover impl thread latency if the draw is fast and we
// are in impl latency takes priority.
scheduler_->SetTreePrioritiesAndScrollState(
SMOOTHNESS_TAKES_PRIORITY,
ScrollHandlerState::SCROLL_DOES_NOT_AFFECT_SCROLL_HANDLER);
fake_compositor_timing_history_->SetAllEstimatesTo(kSlowDuration);
fake_compositor_timing_history_->SetDrawDurationEstimate(kFastDuration);
bool receive_ack_before_deadline = false;
EXPECT_SCOPED(ImplFrameSkippedAfterLateAck(receive_ack_before_deadline));
}
TEST_F(SchedulerTest,
ImplFrameSkippedAfterLateAck_OnlyImplSideUpdatesExpected) {
// This tests that we recover impl thread latency when there are no commits.
SetUpScheduler(EXTERNAL_BFS);
// To get into a high latency state, this test disables automatic swap acks.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// Even if every estimate related to the main thread is slow, we should
// still expect to recover impl thread latency if there are no commits from
// the main thread.
fake_compositor_timing_history_->SetAllEstimatesTo(kSlowDuration);
fake_compositor_timing_history_->SetDrawDurationEstimate(kFastDuration);
// Draw and swap for first BeginFrame
client_->Reset();
scheduler_->SetNeedsRedraw();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_ACTION("AddObserver(this)", client_, 0, 2);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 2);
client_->Reset();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_SINGLE_ACTION("ScheduledActionDrawIfPossible", client_);
// Verify we skip every other frame if the swap ack consistently
// comes back late.
for (int i = 0; i < 10; i++) {
// Not calling scheduler_->DidReceiveCompositorFrameAck() until after next
// BeginImplFrame puts the impl thread in high latency mode.
client_->Reset();
scheduler_->SetNeedsRedraw();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
// Verify that we skip the BeginImplFrame
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
// Verify that we do not perform any actions after we are no longer
// swap throttled.
client_->Reset();
scheduler_->DidReceiveCompositorFrameAck();
EXPECT_NO_ACTION(client_);
// Verify that we start the next BeginImplFrame and continue normally
// after having just skipped a BeginImplFrame.
client_->Reset();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
client_->Reset();
// Deadline should be immediate.
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunUntilTime(now_src_->NowTicks());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_SINGLE_ACTION("ScheduledActionDrawIfPossible", client_);
}
}
void SchedulerTest::ImplFrameNotSkippedAfterLateAck() {
// To get into a high latency state, this test disables automatic swap acks.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// Draw and swap for first BeginFrame
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_ACTION("AddObserver(this)", client_, 0, 3);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 3);
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionCommit", client_, 0, 3);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 1, 3);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 2, 3);
// Verify impl thread consistently operates in high latency mode
// without skipping any frames.
for (int i = 0; i < 10; i++) {
// Not calling scheduler_->DidReceiveCompositorFrameAck() until after next
// frame
// puts the impl thread in high latency mode.
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
client_->Reset();
scheduler_->DidReceiveCompositorFrameAck();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
// Verify that we don't skip the actions of the BeginImplFrame
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 0, 4);
EXPECT_ACTION("ScheduledActionCommit", client_, 1, 4);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 2, 4);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 3, 4);
}
}
TEST_F(SchedulerTest,
ImplFrameNotSkippedAfterLateAck_MainFrameQueueDurationCriticalTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_
->SetBeginMainFrameQueueDurationCriticalEstimate(kSlowDuration);
fake_compositor_timing_history_
->SetBeginMainFrameQueueDurationNotCriticalEstimate(kSlowDuration);
EXPECT_SCOPED(ImplFrameNotSkippedAfterLateAck());
}
TEST_F(SchedulerTest, ImplFrameNotSkippedAfterLateAck_CommitEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_
->SetBeginMainFrameStartToCommitDurationEstimate(kSlowDuration);
EXPECT_SCOPED(ImplFrameNotSkippedAfterLateAck());
}
TEST_F(SchedulerTest,
ImplFrameNotSkippedAfterLateAck_ReadyToActivateEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_->SetCommitToReadyToActivateDurationEstimate(
kSlowDuration);
EXPECT_SCOPED(ImplFrameNotSkippedAfterLateAck());
}
TEST_F(SchedulerTest, ImplFrameNotSkippedAfterLateAck_ActivateEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_->SetActivateDurationEstimate(kSlowDuration);
EXPECT_SCOPED(ImplFrameNotSkippedAfterLateAck());
}
TEST_F(SchedulerTest, ImplFrameNotSkippedAfterLateAck_DrawEstimateTooLong) {
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
fake_compositor_timing_history_->SetDrawDurationEstimate(kSlowDuration);
EXPECT_SCOPED(ImplFrameNotSkippedAfterLateAck());
}
TEST_F(SchedulerTest, MainFrameThenImplFrameSkippedAfterLateCommitAndLateAck) {
// Set up client with custom estimates.
// This test starts off with expensive estimates to prevent latency recovery
// initially, then lowers the estimates to enable it once both the main
// and impl threads are in a high latency mode.
SetUpScheduler(EXTERNAL_BFS);
fake_compositor_timing_history_->SetAllEstimatesTo(kSlowDuration);
// To get into a high latency state, this test disables automatic swap acks.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// Impl thread hits deadline before commit finishes to make
// MainThreadMissedLastDeadline true
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_ACTION("AddObserver(this)", client_, 0, 5);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 5);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 5);
EXPECT_ACTION("ScheduledActionCommit", client_, 3, 5);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 4, 5);
// Draw and swap for first commit, start second commit.
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 5);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 5);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 2, 5);
EXPECT_ACTION("ScheduledActionCommit", client_, 3, 5);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 4, 5);
// Don't call scheduler_->DidReceiveCompositorFrameAck() until after next
// frame
// to put the impl thread in a high latency mode.
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
// Note: BeginMainFrame and swap are skipped here because of
// swap ack backpressure, not because of latency recovery.
EXPECT_FALSE(client_->HasAction("ScheduledActionSendBeginMainFrame"));
EXPECT_FALSE(client_->HasAction("ScheduledActionDrawIfPossible"));
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
// Lower estimates so that the scheduler will attempt latency recovery.
fake_compositor_timing_history_->SetAllEstimatesTo(kFastDuration);
// Now that both threads are in a high latency mode, make sure we
// skip the BeginMainFrame, then the BeginImplFrame, but not both
// at the same time.
// Verify we skip BeginMainFrame first.
client_->Reset();
// Previous commit request is still outstanding.
EXPECT_TRUE(scheduler_->NeedsBeginMainFrame());
EXPECT_TRUE(scheduler_->IsDrawThrottled());
SendNextBeginFrame();
EXPECT_TRUE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->DidReceiveCompositorFrameAck();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 1, 2);
// Verify we skip the BeginImplFrame second.
client_->Reset();
// Previous commit request is still outstanding.
EXPECT_TRUE(scheduler_->NeedsBeginMainFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->DidReceiveCompositorFrameAck();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_NO_ACTION(client_);
// Then verify we operate in a low latency mode.
client_->Reset();
// Previous commit request is still outstanding.
EXPECT_TRUE(scheduler_->NeedsBeginMainFrame());
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
SendNextBeginFrame();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
scheduler_->DidReceiveCompositorFrameAck();
EXPECT_FALSE(scheduler_->MainThreadMissedLastDeadline());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 5);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 5);
EXPECT_ACTION("ScheduledActionCommit", client_, 2, 5);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 3, 5);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 4, 5);
}
TEST_F(
SchedulerTest,
Deadlock_CommitMakesProgressWhileSwapTrottledAndActiveTreeNeedsFirstDraw) {
// NPAPI plugins on Windows block the Browser UI thread on the Renderer main
// thread. This prevents the scheduler from receiving any pending swap acks.
scheduler_settings_.main_frame_while_submit_frame_throttled_enabled = true;
SetUpScheduler(EXTERNAL_BFS);
// Disables automatic swap acks so this test can force swap ack throttling
// to simulate a blocked Browser ui thread.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// Get a new active tree in main-thread high latency mode and put us
// in a swap throttled state.
client_->Reset();
EXPECT_FALSE(scheduler_->CommitPending());
scheduler_->SetNeedsBeginMainFrame();
scheduler_->SetNeedsRedraw();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_FALSE(scheduler_->CommitPending());
EXPECT_ACTION("AddObserver(this)", client_, 0, 6);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 6);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 6);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 3, 6);
EXPECT_ACTION("ScheduledActionCommit", client_, 4, 6);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 5, 6);
// Make sure that we can finish the next commit even while swap throttled.
client_->Reset();
EXPECT_FALSE(scheduler_->CommitPending());
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SCOPED(AdvanceFrame());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionCommit", client_, 2, 3);
// Make sure we do not send a BeginMainFrame while swap throttled and
// we have both a pending tree and an active tree.
client_->Reset();
EXPECT_FALSE(scheduler_->CommitPending());
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_FALSE(scheduler_->CommitPending());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
}
TEST_F(
SchedulerTest,
CommitMakesProgressWhenIdleAndHasPendingTreeAndActiveTreeNeedsFirstDraw) {
// This verifies we don't block commits longer than we need to
// for performance reasons - not deadlock reasons.
// Since we are simulating a long commit, set up a client with draw duration
// estimates that prevent skipping main frames to get to low latency mode.
scheduler_settings_.main_frame_while_submit_frame_throttled_enabled = true;
scheduler_settings_.main_frame_before_activation_enabled = true;
SetUpScheduler(EXTERNAL_BFS);
// Disables automatic swap acks so this test can force swap ack throttling
// to simulate a blocked Browser ui thread.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// Start a new commit in main-thread high latency mode and hold off on
// activation.
client_->Reset();
EXPECT_FALSE(scheduler_->CommitPending());
scheduler_->SetNeedsBeginMainFrame();
scheduler_->SetNeedsRedraw();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
scheduler_->DidReceiveCompositorFrameAck();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_FALSE(scheduler_->CommitPending());
EXPECT_ACTION("AddObserver(this)", client_, 0, 5);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 5);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 2, 5);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 3, 5);
EXPECT_ACTION("ScheduledActionCommit", client_, 4, 5);
// Start another commit while we still have an active tree.
client_->Reset();
EXPECT_FALSE(scheduler_->CommitPending());
scheduler_->SetNeedsBeginMainFrame();
scheduler_->SetNeedsRedraw();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_TRUE(scheduler_->CommitPending());
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
scheduler_->DidReceiveCompositorFrameAck();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 3);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 3);
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 2, 3);
// Can't commit yet because there's still a pending tree.
client_->Reset();
scheduler_->NotifyReadyToCommit();
EXPECT_NO_ACTION(client_);
// Activate the pending tree, which also unblocks the commit immediately
// while we are in an idle state.
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 0, 2);
EXPECT_ACTION("ScheduledActionCommit", client_, 1, 2);
}
void SchedulerTest::BeginFramesNotFromClient(BeginFrameSourceType bfs_type) {
SetUpScheduler(bfs_type);
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame
// without calling SetNeedsBeginFrame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_NO_ACTION(client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// Can't run the deadline task because it can race with begin frame for the
// SyntheticBFS case.
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// NotifyReadyToCommit should trigger the commit.
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
// NotifyReadyToActivate should trigger the activation.
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
client_->Reset();
// BeginImplFrame deadline should draw. The following BeginImplFrame deadline
// should SetNeedsBeginFrame(false) to avoid excessive toggles.
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 2);
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 2);
client_->Reset();
// Make sure SetNeedsBeginFrame isn't called on the client
// when the BeginFrame is no longer needed.
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_SINGLE_ACTION("SendBeginMainFrameNotExpectedSoon", client_);
client_->Reset();
}
TEST_F(SchedulerTest, SyntheticBeginFrames) {
BeginFramesNotFromClient(THROTTLED_BFS);
}
TEST_F(SchedulerTest, UnthrottledBeginFrames) {
BeginFramesNotFromClient(UNTHROTTLED_BFS);
}
void SchedulerTest::BeginFramesNotFromClient_IsDrawThrottled(
BeginFrameSourceType bfs_type) {
SetUpScheduler(bfs_type);
// Set the draw duration estimate to zero so that deadlines are accurate.
fake_compositor_timing_history_->SetDrawDurationEstimate(base::TimeDelta());
// To test swap ack throttling, this test disables automatic swap acks.
client_->SetAutomaticSubmitCompositorFrameAck(false);
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_NO_ACTION(client_);
client_->Reset();
// Trigger the first BeginImplFrame and BeginMainFrame
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// NotifyReadyToCommit should trigger the pending commit.
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
// NotifyReadyToActivate should trigger the activation and draw.
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
client_->Reset();
// Swapping will put us into a swap throttled state.
// Run posted deadline.
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
// While swap throttled, BeginFrames should trigger BeginImplFrames,
// but not a BeginMainFrame or draw.
scheduler_->SetNeedsBeginMainFrame();
scheduler_->SetNeedsRedraw();
EXPECT_SCOPED(AdvanceFrame()); // Run posted BeginFrame.
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
base::TimeTicks before_deadline, after_deadline;
// The deadline is set to the regular deadline.
before_deadline = now_src()->NowTicks();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
after_deadline = now_src()->NowTicks();
// We can't do an equality comparison here because the scheduler uses a fudge
// factor that's an internal implementation detail.
EXPECT_GT(after_deadline, before_deadline);
EXPECT_LT(after_deadline,
before_deadline + BeginFrameArgs::DefaultInterval());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
EXPECT_SCOPED(AdvanceFrame()); // Run posted BeginFrame.
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// Take us out of a swap throttled state.
scheduler_->DidReceiveCompositorFrameAck();
EXPECT_SINGLE_ACTION("ScheduledActionSendBeginMainFrame", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// The deadline is set to the regular deadline.
before_deadline = now_src()->NowTicks();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
after_deadline = now_src()->NowTicks();
// We can't do an equality comparison here because the scheduler uses a fudge
// factor that's an internal implementation detail.
EXPECT_GT(after_deadline, before_deadline);
EXPECT_LT(after_deadline,
before_deadline + BeginFrameArgs::DefaultInterval());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
}
TEST_F(SchedulerTest, SyntheticBeginFrames_IsDrawThrottled) {
BeginFramesNotFromClient_IsDrawThrottled(THROTTLED_BFS);
}
TEST_F(SchedulerTest, UnthrottledBeginFrames_IsDrawThrottled) {
BeginFramesNotFromClient_IsDrawThrottled(UNTHROTTLED_BFS);
}
TEST_F(SchedulerTest,
DidLoseCompositorFrameSinkAfterCompositorFrameSinkIsInitialized) {
SetUpSchedulerWithNoCompositorFrameSink(EXTERNAL_BFS);
scheduler_->SetVisible(true);
scheduler_->SetCanDraw(true);
EXPECT_SINGLE_ACTION("ScheduledActionBeginCompositorFrameSinkCreation",
client_);
client_->Reset();
scheduler_->DidCreateAndInitializeCompositorFrameSink();
EXPECT_NO_ACTION(client_);
scheduler_->DidLoseCompositorFrameSink();
EXPECT_SINGLE_ACTION("ScheduledActionBeginCompositorFrameSinkCreation",
client_);
}
TEST_F(SchedulerTest, DidLoseCompositorFrameSinkAfterBeginFrameStarted) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
// RemoveObserver(this) is not called until the end of the frame.
EXPECT_NO_ACTION(client_);
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_ACTION("ScheduledActionCommit", client_, 0, 2);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 1, 2);
client_->Reset();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 0,
3);
EXPECT_ACTION("RemoveObserver(this)", client_, 1, 3);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 2, 3);
}
TEST_F(SchedulerTest,
DidLoseCompositorFrameSinkAfterBeginFrameStartedWithHighLatency) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
// Do nothing when impl frame is in deadine pending state.
EXPECT_NO_ACTION(client_);
client_->Reset();
// Run posted deadline.
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
// OnBeginImplFrameDeadline didn't schedule CompositorFrameSink creation
// because
// main frame is not yet completed.
EXPECT_ACTION("RemoveObserver(this)", client_, 0, 2);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 1, 2);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
// BeginImplFrame is not started.
client_->Reset();
task_runner().RunUntilTime(now_src()->NowTicks() +
base::TimeDelta::FromMilliseconds(10));
EXPECT_NO_ACTION(client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_ACTION("ScheduledActionCommit", client_, 0, 3);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 1, 3);
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 2,
3);
}
TEST_F(SchedulerTest, DidLoseCompositorFrameSinkAfterReadyToCommit) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
// Sync tree should be forced to activate.
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
// RemoveObserver(this) is not called until the end of the frame.
client_->Reset();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 0,
3);
EXPECT_ACTION("RemoveObserver(this)", client_, 1, 3);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 2, 3);
}
TEST_F(SchedulerTest, DidLoseCompositorFrameSinkAfterSetNeedsPrepareTiles) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetNeedsPrepareTiles();
scheduler_->SetNeedsRedraw();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
// RemoveObserver(this) is not called until the end of the frame.
EXPECT_NO_ACTION(client_);
client_->Reset();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionPrepareTiles", client_, 0, 4);
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 1,
4);
EXPECT_ACTION("RemoveObserver(this)", client_, 2, 4);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 3, 4);
}
TEST_F(SchedulerTest,
DidLoseCompositorFrameSinkWithDelayBasedBeginFrameSource) {
SetUpScheduler(THROTTLED_BFS);
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
EXPECT_FALSE(scheduler_->begin_frames_expected());
scheduler_->SetNeedsBeginMainFrame();
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
AdvanceFrame();
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
// NotifyReadyToCommit should trigger the commit.
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
EXPECT_TRUE(scheduler_->begin_frames_expected());
// NotifyReadyToActivate should trigger the activation.
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
// RemoveObserver(this) is not called until the end of the frame.
EXPECT_NO_ACTION(client_);
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 0,
2);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 1, 2);
EXPECT_FALSE(scheduler_->begin_frames_expected());
}
TEST_F(SchedulerTest, DidLoseCompositorFrameSinkWhenIdle) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
client_->Reset();
task_runner().RunTasksWhile(client_->InsideBeginImplFrame(true));
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
// Idle time between BeginFrames.
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 0,
3);
EXPECT_ACTION("RemoveObserver(this)", client_, 1, 3);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 2, 3);
}
TEST_F(SchedulerTest, ScheduledActionActivateAfterBecomingInvisible) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->SetVisible(false);
task_runner().RunPendingTasks(); // Run posted deadline.
// Sync tree should be forced to activate.
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 0, 3);
EXPECT_ACTION("RemoveObserver(this)", client_, 1, 3);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 2, 3);
}
TEST_F(SchedulerTest, ScheduledActionActivateAfterBeginFrameSourcePaused) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
fake_external_begin_frame_source_->SetPaused(true);
task_runner().RunPendingTasks(); // Run posted deadline.
// Sync tree should be forced to activate.
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
}
// Tests to ensure frame sources can be successfully changed while drawing.
TEST_F(SchedulerTest, SwitchFrameSourceToUnthrottled) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsRedraw should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsRedraw();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
scheduler_->SetNeedsRedraw();
// Switch to an unthrottled frame source.
scheduler_->SetBeginFrameSource(unthrottled_frame_source_.get());
client_->Reset();
// Unthrottled frame source will immediately begin a new frame.
task_runner().RunPendingTasks(); // Run posted BeginFrame.
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
// If we don't swap on the deadline, we wait for the next BeginFrame.
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
}
// Tests to ensure frame sources can be successfully changed while a frame
// deadline is pending.
TEST_F(SchedulerTest, SwitchFrameSourceToUnthrottledBeforeDeadline) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsRedraw should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsRedraw();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
// Switch to an unthrottled frame source before the frame deadline is hit.
scheduler_->SetBeginFrameSource(unthrottled_frame_source_.get());
client_->Reset();
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 2);
// Unthrottled frame source will immediately begin a new frame.
EXPECT_ACTION("WillBeginImplFrame", client_, 1, 2);
scheduler_->SetNeedsRedraw();
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_SINGLE_ACTION("ScheduledActionDrawIfPossible", client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
}
// Tests to ensure that the active frame source can successfully be changed from
// unthrottled to throttled.
TEST_F(SchedulerTest, SwitchFrameSourceToThrottled) {
SetUpScheduler(UNTHROTTLED_BFS);
scheduler_->SetNeedsRedraw();
EXPECT_NO_ACTION(client_);
client_->Reset();
task_runner().RunPendingTasks(); // Run posted BeginFrame.
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
// Switch to a throttled frame source.
scheduler_->SetBeginFrameSource(fake_external_begin_frame_source_.get());
client_->Reset();
// SetNeedsRedraw should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsRedraw();
task_runner().RunPendingTasks();
EXPECT_NO_ACTION(client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 1);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
EXPECT_TRUE(scheduler_->begin_frames_expected());
client_->Reset();
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
}
TEST_F(SchedulerTest, SwitchFrameSourceToNullInsideDeadline) {
SetUpScheduler(EXTERNAL_BFS);
scheduler_->SetNeedsRedraw();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_SINGLE_ACTION("WillBeginImplFrame", client_);
client_->Reset();
// Switch to a null frame source.
scheduler_->SetBeginFrameSource(nullptr);
EXPECT_SINGLE_ACTION("RemoveObserver(this)", client_);
client_->Reset();
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunPendingTasks(); // Run posted deadline.
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
EXPECT_FALSE(scheduler_->begin_frames_expected());
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
// AdvanceFrame helper can't be used here because there's no deadline posted.
scheduler_->SetNeedsRedraw();
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_NO_ACTION(client_);
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
EXPECT_NO_ACTION(client_);
client_->Reset();
// Switch back to the same source, make sure frames continue to be produced.
scheduler_->SetBeginFrameSource(fake_external_begin_frame_source_.get());
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
EXPECT_FALSE(client_->IsInsideBeginImplFrame());
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
client_->Reset();
task_runner().RunPendingTasks();
EXPECT_ACTION("ScheduledActionDrawIfPossible", client_, 0, 1);
}
// This test maskes sure that switching a frame source when not observing
// such as when not visible also works.
TEST_F(SchedulerTest, SwitchFrameSourceWhenNotObserving) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
// Begin new frame.
EXPECT_SCOPED(AdvanceFrame());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
client_->Reset();
scheduler_->NotifyReadyToCommit();
EXPECT_SINGLE_ACTION("ScheduledActionCommit", client_);
client_->Reset();
scheduler_->NotifyReadyToActivate();
EXPECT_SINGLE_ACTION("ScheduledActionActivateSyncTree", client_);
// Scheduler loses CompositorFrameSink, and stops waiting for ready to draw
// signal.
client_->Reset();
scheduler_->DidLoseCompositorFrameSink();
EXPECT_TRUE(client_->IsInsideBeginImplFrame());
task_runner().RunPendingTasks();
EXPECT_ACTION("ScheduledActionBeginCompositorFrameSinkCreation", client_, 0,
3);
EXPECT_ACTION("RemoveObserver(this)", client_, 1, 3);
EXPECT_ACTION("SendBeginMainFrameNotExpectedSoon", client_, 2, 3);
// Changing begin frame source doesn't do anything.
// The unthrottled source doesn't print Add/RemoveObserver like the fake one.
client_->Reset();
scheduler_->SetBeginFrameSource(unthrottled_frame_source_.get());
EXPECT_NO_ACTION(client_);
client_->Reset();
scheduler_->DidCreateAndInitializeCompositorFrameSink();
EXPECT_NO_ACTION(client_);
client_->Reset();
scheduler_->SetNeedsBeginMainFrame();
EXPECT_NO_ACTION(client_);
client_->Reset();
EXPECT_SCOPED(AdvanceFrame());
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 2);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 2);
}
// Tests to ensure that we send a BeginMainFrameNotExpectedSoon when expected.
TEST_F(SchedulerTest, SendBeginMainFrameNotExpectedSoon) {
SetUpScheduler(EXTERNAL_BFS);
// SetNeedsBeginMainFrame should begin the frame on the next BeginImplFrame.
scheduler_->SetNeedsBeginMainFrame();
EXPECT_SINGLE_ACTION("AddObserver(this)", client_);
client_->Reset();
// Trigger a frame draw.
EXPECT_SCOPED(AdvanceFrame());
scheduler_->NotifyBeginMainFrameStarted(base::TimeTicks());
scheduler_->NotifyReadyToCommit();
scheduler_->NotifyReadyToActivate();
task_runner().RunPendingTasks();
EXPECT_ACTION("WillBeginImplFrame", client_, 0, 5);
EXPECT_ACTION("ScheduledActionSendBeginMainFrame", client_, 1, 5);
EXPECT_ACTION("ScheduledActionCommit", client_, 2, 5);
EXPECT_ACTION("ScheduledActionActivateSyncTree", client_, 3, 5